66344725131 has 4 divisors (see below), whose sum is σ = 88459633512. Its totient is φ = 44229816752.

The previous prime is 66344725121. The next prime is 66344725163. The reversal of 66344725131 is 13152744366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66344725131 - 2³³ = 57754790539 is a prime.

It is a super-2 number, since 2×66344725131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66344725121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11057454186 + ... + 11057454191.

It is an arithmetic number, because the mean of its divisors is an integer number (22114908378).

Almost surely, 2^66344725131 is an apocalyptic number.

66344725131 is a deficient number, since it is larger than the sum of its proper divisors (22114908381).

66344725131 is a wasteful number, since it uses less digits than its factorization.

66344725131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22114908380.

The product of its digits is 362880, while the sum is 42.

The spelling of 66344725131 in words is "sixty-six billion, three hundred forty-four million, seven hundred twenty-five thousand, one hundred thirty-one".